Appendix B. Data on annual population size, index of reproduction quality, and harvest of Chen caerulescens atlantica.
TABLE B1. Annual spring population size, index of summer reproduction quality (1 = good, 2 = average, 3 = bad) and fall-winter harvest of Greater Snow Geese over the period 1985–1986 to 2005–2006. Values in italics are not used for model fitting but are used for generating population forecasts for three additional years.
Year |
Population size |
Reproduction |
Harvest |
|
Young |
Adults |
|||
1985–1986 |
260,000 |
2 |
23,438 |
16,062 |
1986–1987 |
303,500 |
3 |
3,806 |
14,694 |
1987–1988 |
255,000 |
1 |
52,932 |
13,668 |
1988–1989 |
363,800 |
1 |
51,411 |
19,565 |
1989–1990 |
363,200 |
1 |
38,696 |
24,269 |
1990–1991 |
368,300 |
2 |
47,999 |
35,250 |
1991–1992 |
352,600 |
1 |
59,900 |
18,277 |
1992–1993 |
448,100 |
3 |
7,987 |
30,188 |
1993–1994 |
498,400 |
1 |
111,738 |
24,149 |
1994–1995 |
591,400 |
3 |
22,363 |
37,692 |
1995–1996 |
616,600 |
2 |
43,761 |
26,860 |
1996–1997 |
669,100 |
2 |
62,619 |
39,477 |
1997–1998 |
657,500 |
1 |
74,182 |
26,225 |
1998–1999 |
834,700† |
1 |
141,415 (16,564)§ |
76,402 (27,607) |
1999–2000 |
937,850† |
3 |
4,383 (807) |
79,281 (53,769) |
2000–2001 |
808,300† |
2 |
100,779 (11,794) |
55,520 (37,976) |
2001–2002 |
834,000‡ |
2 |
102,983 (27,205) |
59,751 (44,599) |
2002–2003 |
639,300‡ |
3 |
22,112 (466) |
65,770 (22,169) |
2003–2004 |
678,001‡ |
1 |
82,298 (14,704) |
44,706 (18,197) |
2004–2005 |
957,900‡ |
2 |
46,500 (7,930) |
51,456 (26,664) |
2005–2006 |
814,600‡ |
- |
- |
- |
† Population size estimates corrected by telemetry following Béchet et al. (2004).
‡ Population size estimates using a revised survey protocol in 2001 and again in 2004 (see Methods).
§ Values in parentheses are the additional harvest brought by the spring conservation harvest that began in Québec in 1999. Although the spring harvest overlapped with the population survey, we considered that all harvest occurred before the survey (i.e., in the previous time interval) for simplicity.
LITERATURE CITED
Béchet, A., A. Reed, N. Plante, J.-F. Giroux, and G. Gauthier. 2004. Estimating the size of large bird populations: the case of the Greater Snow Goose. Journal of Wildlife Management 68:639–649.